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प्रश्न
How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?
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उत्तर
Each ovary produces several immature eggs, which are connected with groups of other cells known as follicles. In humans, only one egg is usually removed at a time; however, two or more may emerge during the menstrual cycle. The egg emerges from the ovary between the 14th and 16th days of the typically 28-day menstrual cycle. Fertilisation of a single egg results in one zygote (monozygotic) that divides into two embryos, forming identical twins. If the twins were born fraternal, two eggs would be released. Fraternal twins (also known as non-identical twins) are typically formed when two fertilised eggs are implanted in the uterine wall at the same time. The two eggs produce two zygotes; hence, these twins are also known as dizygotic or binovular twins.
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संबंधित प्रश्न
Name the function of the following:
Endometrium
Fill in the blank:
The time between fertilisation and birth is called _________.
Give the appropriate term for the following:
Monthly discharge of blood and disintegrated tissues in the human female
Differentiate between:
Prostate gland and cowper’s gland (the nature of secretion)
The diagram alongside is the vertical section of female reproductive organs. Study the diagram and answer the questions that follow:
- Name the fully developed part of ovary containing the ovum.
- Name the organ of the female body in which the foetus develops.
- What is ovulation?
- Which two hormones are secreted by ovary?
Name the following:
The parts of the ovary containing mature ovum.
Name the following:
The part of the female reproductive system in which fertilization occurs.
Name the Following
A cellular sac containing maturing egg.
Give Technical Term:
Name the tube that leads from the ovary to the uterus.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The cilia lining the oviduct funnel, push the released ovum into the uterus.
What is true of gametes?
The implantation of the embryo occurs at about ______ days of fertilization.
Bartholin’s glands are situated ______.
Cleavage in mammalian egg is ______.
Mark the odd one.
When sperm is deposited into the vagina which route does it travel?
Tubectomy is carried out by blocking the ______
In human females, an event that reflects onset of reproductive phase is
What changes are observed in the uterus subsequent to the implantation of a young embryo?
What are various ways to avoid pregnancy? Elaborate any one method.
Capacitation occurs in:
Which is a pear-shaped muscular organ in females?
The oviducts are also known as ______.
______ receives the sperms and acts as a birth canal during childbirth.
Given below are the structural details of a human mammary gland:
- The glandular tissue in the breast has 15-20 clusters. of cells called alveoli.
- The milk is stored in the lumen of the alveoli.
- The alveoli join to form the mammary ducts.
- Mammary ampulla is connected to lactiferous ducts.
Choose the option that gives the correct detail of the human mammary gland.
Clitoris is equivalent to the male penis.
Rewrite the terms in the correct order so as to be in a logical sequence.
Graafian follicle, ostium, uterus, fallopian tube, ovum.
Write the specific location of the following:
Uterus
Median vertical depression of external genitalia in females, enclosing the urethral and vaginal opening is ______.
